Knollwood, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Knollwood, IL in one place.
A slight chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 84. South wind 6 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Knollwood, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 16, 2026 8:22 PM CDT.
The active forecast window currently covers Apr 17 to Apr 23, 2026 for Knollwood, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 17 to Apr 23, 2026
- Latest sync
- Apr 16, 2026 8:22 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Knollwood
Friday looks like the warmest upcoming period in Knollwood at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Friday at about 6 to 18 mph S.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 8:22 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 10pm, then showers and thunderstorms. Mostly cloudy. Low around 47, with temperatures rising to around 53 overnight. Southwest wind 15 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
A chance of rain showers. Mostly sunny, with a high near 56. West northwest wind around 18 mph, with gusts as high as 29 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers before 7pm, then patchy frost. Mostly clear, with a low around 36. West northwest wind 8 to 16 mph, with gusts as high as 26 mph. New rainfall amounts less than a tenth of an inch possible.
Patchy frost before 8am. Sunny, with a high near 60. West northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Patchy frost after 3am. Mostly clear, with a low around 38. Northeast wind 5 to 12 mph, with gusts as high as 20 mph.
Patchy frost before 8am. Sunny, with a high near 68.
Mostly clear, with a low around 52.
Mostly sunny, with a high near 77.
Partly cloudy, with a low around 56.
Mostly sunny, with a high near 78.
A slight chance of rain showers after 1am. Mostly clear, with a low around 54.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 17
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
84°F |
6 to 18 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms Likely then Showers And Thunderstorms
|
47°F |
15 to 18 mph
SW
|
|
Saturday
Apr 18
|
Chance Rain Showers
|
56°F |
18 mph
WNW
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Patchy Frost
|
36°F |
8 to 16 mph
WNW
|
|
Sunday
Apr 19
|
Patchy Frost then Sunny
|
60°F |
8 to 16 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear then Patchy Frost
|
38°F |
5 to 12 mph
NE
|
|
Monday
Apr 20
|
Patchy Frost then Sunny
|
68°F |
5 to 12 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
52°F |
9 to 13 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
77°F |
13 to 17 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
56°F |
9 to 13 mph
WSW
|
|
Wednesday
Apr 22
|
Mostly Sunny
|
78°F |
10 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear then Slight Chance Rain Showers
|
54°F |
9 mph
S
|
|
Thursday
Apr 23
|
Chance Showers And Thunderstorms
|
78°F |
9 to 14 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Knollwood.